If you bedshare with your baby, do you just all go to bed at the same time? Did you move your own bedtime up to match baby's? By how much?

We've been bedsharing with LO almost exclusively because he just sleeps better that way but now that he's 4 months I'm getting the feeling he should have a bedtime earlier than ours, which is usually 11p or midnight. Yes, we've been keeping our baby up that late. Yes, I know Weissbluth would have us executed.